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(No Model.) 2 Sfieets-Sheet 1. W. E. BROWNING.

Millstone Dressing Machine.

No. 229,858. Patented .luly13, 1880.

5 II uuuuuu mL "Hill" a d ll iii llllmm. 3 a ri 1 WITNESSES E) INVENTOR 2 Sfieets-Sheet 2.

W. E. BROWNING. Millstone Dressing Machine.

IIIIIIIIK (No Model.)

ATTORNEY i i W M n v .PETERB, PHOI'D-LITHOGRAPHER, WASHINGTON, D C

WITNESSES 1 proved millstone-dresser.

STATES PAEENT OFFICE.

WILLIAM E.. BROWNING, or SWEET WATER, TENNESSEE, ASSIGNOR or ONE-HALFOF HIs'EIeHT TO STEPHEN FLOYD, 0F sAME PLACE.

MI LLSTONE-DR ESSING MACHINE.

SPECIFICATION forming partof Letters Patent we. 229,858, dated July 13, 1880.

Application filed March 26, 1880. (No model.)

To all whom it may concern: 7

Be it known that I, W. E. BROWNING, of Sweet Water, in the county of Monroe and State of Tennessee, have invented certain new and useful Improvements in Millstone-Dressing Machines; and I do hereby declare that the following is a full, clear, and'exact description of the-invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, which form a part of this specification.

Figure 1 is a perspective View of my im- Fig.2 is a longitudinal vertical sectional view, and Fig. 3 is a vertical cross-section.

Corresponding parts in the several figures are denoted by like letters of reference.

This invention relates-to machines for dressing millstones; and it consists in certain improvements in the construction thereof, which will be hereinafter more fully described, and particularly pointed out in the claims.

The lower section of my improved machine consists-of a frame, A, mounted upon two parallel rollers, B B, by which it is made capable of being moved laterally over the face of the stone.

Centrally upon the frame A is pivoted another frame, O, upon which the third or upper section, D, is mounted, said section D being provided with clamps or catches E E, by which it is secured to and slides upon guides F F upon section G. Studs G G confine the sliding movement of frame D and prevent it from sliding off frame 0.

Near the front end of the section D are arranged brackets H, which have bearings for a shaft, I, provided with a crank, J, and a cam-wheel, K. The brackets H are connected by abrace, L, with similar brackets M, near the rear end of the frame, between which said brackets an arm, N, is pivoted.

Additional braces, O 0, connect the brackets Or-Hprights H M, as shown.

The pivoted arm N is provided, directly above the cam-wheel K, with a beveled stud, P, which-engages the beveled cams constituting said wheel.

Arm N terminates in a downwardly-projecting socket, Q, in which the cutting-tool R is vertically adjustable by a set-screw, S.

A coiled spring, T, is secured to a brace, L, and to an eye, U, formed upon a screwbolt, V, which passes through arm N, in which it may be adjusted by a nut, W, thus regulating the tension of the spring.

A thumb-screw, X, working in arm N, bears against a plate, Y, secured to the under side of said arm and provided with a downwardlyprojecting rod, Z,which passes through a hearing in a plate, A, connecting the braces O O, and is provided with a rubber sleeve, B, forming a cushion for arm N.

Thumb-screw X serves to regulate the force of the blow and the recoil of arm N by adjusting the latter in relation to the cushion.

To adjust the section D upon frame 0, I provide the latter with a longitudinal rack, G, engaging a pinion, D, upon the lower end of a vertical shaft, E, arranged in suitable bearings upon section D. Shaft E is provided with a suitable handle, crank, or disk, by which it may be conveniently operated to propel the section D forward or backward upon frame (J.

The operation of my invention will be easily understood. By operating crank J the cams of wheel K successively engage the beveled stud P upon arm N, thus raising the latter until the cam has passed the stud, when the arm, by its own weight, as well as by the tension of spring T, is forced down, thus bringing the cutting-tool down against the face of the stone with a force which may be regulated by regulating the tension of the spring or the recoil-cushion, or both, as hereinbefore described.

By the adjustability of the several sections of the machine, as hereinbefore described, I am enabled to make straight or curved, parallel or concentric, circular or irregular, cuts, as may be desired.

The methods of making the various kinds of cuts will be readily understood by any one skilled in the art to which my invention appertains.

Without changing the spirit of my invention, two or more picks or cutting-tools, oper- 2. The combination of the pivoted arm N, 15 i having dressing-tool R, plate Y, provided with rods Z and thumb-screw X, rubber sleeve or cushion B, plate or cross-piece A", supporting I said cushion and forming a bearing for rod Z, I and mechanism for operating arm N, substantially as and for the purpose-set forth.

In testimony that I elaim the foregoing as my own I hare hereto affixed my signature in presence of two witnesses.

WILLIAM ELLISON BROWNING.

Witnesses:

J No. L. MCKINNEY, WM. F. Henson. 

